Road-roller.



L. B. WEBSTER.

ROAD ROLLER.

APPLICATION FILED r1313. 18, 1910,

Patented Dec. 8, 1914.

4 SHEETBSHEET 1.

LIB. WEBSTER.

ROAD ROLLER. APPLICATION. FILED PEB.18,1910

1,1 20,427, Patented Dec. 8, 1914.

4 SHEETS-3HBET 2.

L. B. WEBSTER.

ROAD ROLLER.

APPLICATION FILED PEB.18, 1910.

Patented Dec. 8, 1914.

4 SHEETBBHEET 3.

IIIII,

I7? W12 for L. B. WEBSTER.

ROAD ROLLER.

APPLICATION FILED FEB.1B,1910.

Patented Dec. 8, 1914.

SHEET 4.

4 SHEETS- 3m 1 1 A l 8 1 9 l 2 6 1 G 2 E 6 l l W 1 fnzrenl'al' K6. M

customary in this class of machines.

LAWRENCE B. WEBSTER, F MAR-ION, INDIANA.

' ROAD-ROLLER.

Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed February 18, 1910. Serial No. 544,644.

To'aZZ wlzomit may concern: q

Be it known that I, LAWRENCE B. WEB- srnn, a citizen of the United States, residing at Marion, in the county of Grant and State of Indiana, have invented certain new and useful Improvements in Road-Rollers, of which the following is a specification, reference being had therein to the accompanving drawing.

My invention relates to power driven roadrollers, and consists in the arrangements and organizations of parts hereinafter fully described and then pointed out in the appended claims.

In the accompanying drawings which illustrate a practical embodiment of the various features of my invention, Figure 1 is a side elevation of the complete machine; Fig. 2 is a top plan view of the machine of Fig. l with the canopy removed and control levers omitted; Fig. 3 is a detail view of parts of the machine, partlyin top plan and partly in horizontal section, showing the clutch, reversing gear, and control mechanism; Fig. 4 is a detail view partly in section and partly in side elevation, showing the parts of Fig.3; Fig. 5 is a detail view, partly in section and partly in elevation, showing some of the parts shown in Fig. Fig. 6 is alongitudinal section on an enlarged scale through the shaft of the friction clutch, and Fig. 7 is a longitudinal section on an enlarged scale through the rear axle and the reversing gear.

Referring to the drawings, the supporting frame-work of the machine comprises as its principal elements a pair of vertical, side-plates 1 extending substantially the full length of the machine and of-sufiicient depth to afford astrong and rigid frame as is These side plates have suitable bearings 2 for the rear axle 3 carrying the broad rear traction wheels, and at their forward ends they are arched upward and are suitably bolted to the shank of a head post 4-, which is pivotally mounted on a spindle 5 connected through a hinge joint with a fork 6, in which is journa-led the broad divided front wheel or roller of the machine, all arranged in a. manner now well understood. The side plates are rigidly connected and spaced by connecting plates 7, engine brackets 8, and the supports of the bearings for the power-transmitting'shafts. The motor 10 extending longitudinally of the machine 0 and carryinglthe balance wheels 11 and 12 at its outer ends and entirely inside the planes of the side-plates of theframe. On the end of the engine shaft projecting toward the forward end of the machine 5 is fastened by bolts 13 the shaft 14, which is supported at its end away from the engine by the bearing 15. A hollow shaft or sleeve 16 incloses this projecting shaft, and

at the end next to the engine carries a friction clutch member 17 having a beveled face 18 and which is mounted to revolve therewith and slide thereon. The sleeve also carries pivoted dogs 19 and a sliding beveled collar 20 acting on the dogs and adapted to cause them to press against and move the member 17 along the sleeve to push it into engagement with the balance wheel 11, which acts as a friction bell. on

thehollow shaft are fastened two spur pin-- 0 ions 21 and 22 of unequal diameters. A transmission shaft 23 is mounted in bearings 2% below and parallel with shaft 14 and extends longitudinally of the machine, and

two spur gears 25 and 26 splined on the shaft 23 are connected together with a spacing sleeve 27 so that either gear can be thrown into engagement with its corresponding pinion on the hollow shaft. The

sleeve 27 is shifted by a lever mechanism 90.

consisting of a pivoted forked lever (not shown) connected by means of the link 30 .to a change-speed hand lever 31 in easy reach of the personoperating the machine.

It will be observed that by reason of the pinion 21 being smaller than the pinion 22, and the gear 25 which meshes with the pinion 21 being larger than the gear 26 a slower speed will be transmitted to the shaft 23 when 21 and 25 are engaged than when 22 and 26 are engaged. o

The shaft 23 connects the sllding gears 25 and 26 with a. bevel pinion 32 mounted on the opposite end of the shaft, and a pair of bevel gears 33 and 34 mesh with the bevel pinion 32 on the opposite sides thereof and are free to turn about a. counter-shaft 35 mounted in bearings 36 in the side plates. Upon the inner opposite faces of the bevel gears jaws are out, and splined to the shaft-11o 35 between the bevel gears is a sliding clutch 37, which by a system of levers to be fully described later, can be thrown into engagement with the jaws of either bevel gear or 5 into an intermediate non-engaging position between them. It will be observed thatby reason of the bevel gears 33 and 34 meshing with the bevel pinion 32 on its opposite sides, the shaft 35 maybe revolved in' either direction by shifting the sliding jaw clutch 37 into engagement with the associated bevel gear, or the shaft may be stationary and not revolved when the sliding clutch is disengaged from both bevel gears. The countershaft 35 has fastened to it a brake drum 38 around which passes the usual brake-band (not shown) which can be tightened by any suitable means, such as the usual foot lever (not shown), so that the operator can control the motion of the counter-shaft. The

counter-shaft 35 is'provided preferably inside the side-plates 1, with the driving pinion 39 which engages with the central gearring 40 of the usual difierential gear upon the re ar'axle 3.

i From the foregoing description it will be seen that by shifting the sliding clutch 37 into engagement with one or the other of the bevel gears .a forward or backward movement of the machine can be obtained and that by reason of the difference in the relative proportions of the two pairs of transmitting gears 2125 and 2226 the machine can be driven at a faster or slower 85 speed, at the pleasure of the operator; the

machine can run either forward or backward at a slow or high speed, having exactly the same speed or travel, whether fast or slow, in both forward and backward direc-" tions.

In connection with the power-transmis sion mechanism above described, I have pro vided a system'of control levers whereby the operator by a single hand-lever may throw the engine out of engagement with the power-transmission system whenever the roller is stopped or reversed, thus preventing any shocks resulting from such operations from injuring the mechanism of the engine. I

' Referring more particularly to" Figs. 3, 4 and 5, Iprovide the j aw-clutch 37, splined on the shaft 35 with sufiicient lateral movement to engage with either bevel gear or 'ment to cause its'pa-wl to drop into the left by the bell-crank lever whose upper end -en-. gages an offset 52thereof, and the free end of the lever 42 is yoked" or forked to provide a pair of ears 53 through which the rod 49 freely passes. Between the ears of the fork of the lever 42a collar 54 is fastened on the rod 49, and a compression spring 55 is mounted on the rod 49 on each side of the collar and between it and adjacentiear of the forkof the lever 42. The engine clutch 17 and bell 11 are thrown into engagement when the; sleeve 20 slidingly mounted on the shaft 16 is moved to raise the ends of the" dogs 19, and causes these dogs to press with their opposite ends against the face of the clutch 17 to press it into frictional engagement with the bell, I and for this purpose the angle-lever 44 is connected to the loose sleeve 20 by the links 56-and 57 suitably supported on the frame and engaging the free end of a lever 58 fixed on a pivoted rock-shaft 59 mounted in bearings 60 and carrying a forked lever'61 engaging a collar 62 lyingloosely in a circumferential groove of the part 20.

v The upper end of the'arm 46 is adjacent the operators position and when the operator gives the .angle-lever'44 suflicient movehandend notch in Fig. 4, one of the compression springs 55 will be compressed and cause the balanced forked lever 42 to turn on its pivot, thereby engaging the sliding clutch 37 with the bevel gear 34, and the same motion of the angle-lever 44 will cause the link 56 to move toward the operator and shift the lever 61 on its pivot and moves the loose sleeve 20 to raise the dogs 19 to force the clutch 17 into engagementwith the bell 11. When the operator moves the angle-lever .in the opposite direction so that its pawl drops into the opposite end notch, the opposite one of the compression springs is compressed and the sliding clutch 37 is engaged with the bevel gear 33, and as'the bevel gears are on opposite sides of the bevel pinion, motion in either direction can, thus be transmitted to the traction wheels of the roller by engaging either one of the bevel gears, and as the links 56 and 57 andthe pivot 45 of the angle-lever 44 are all on the same straight line, when the angle-lever is moved into the position last described, it transmits to the connecting link 56 the same motion toward the operator Y that it had before to engage the engine clutch. It will be observed that the. engine clutch is forced into engagement with the bell whenever the jaw-clutch 37'is thrown 1 travel of the machine, the arrangement bevof side plates,

ing such that the engine clutch is necessarily disconnected before a reversal of travel of the machine is effected.

The fork6 is shifted to steer the machine by chains 63 wound on drums 64 on a shaft 65 provided with a worm wheel 66 operated by a worm 67 on the usual steering-post 68. The steering gear is located inside thesidelate. P The engine is mounted between the side plates and may be hung more or less low down to lower the center of gravity; the

ward of the engine so that the latter is located back in the frame near the rear wheels. All the parts of the engine, and the change-speed gearing and steering gearing and differential gear are inside the side plates so that'no'parts are exposed; the plates 7 forms a shield at the front end to protect the parts from dustand dirt and with the bottom extensions provides an inclosing casing for the entire mechanism.

I claim: 1. In a power propelled road roller, the combination with a. frame comprising a pair a steering wheel at the forward end thereof, an axle and pair of traction wheels mounted on said frame, and supporting the rear end thereof, a gas engine disposed between said side plates, an

engine shaft extending longitudinally of the frame and having a balance wheel inside of said side plates, a transmission shaft extending longitudinally of the side plates, a change speed gear between said engine shaft and said transmission shaft, a clutch between said change speed gear and the engine shaft, a reversing gear between the transmission shaft and the axle, a. lever on the frame, and connections between the le-.

ver and the clutch and reversing gear for coordinately operating the same, said speed change gear, engine shaft, transmission shaft and reversing gear being located between the side plates and between the upper and lower edges thereof whereby said parts are protected. a

2. In a power propelled road roller, the combination with a frame, a steering wheel in the forward end thereof, an axle and pair of traction wheels frame, and supporting the rear end thereof, a gas engmeand engine shaft mounted on said frame, atransmission shaft, the speed connecting the enchange-speed gearing and clutch are formounted on said gine shaft to the transmission shaft, a friction clutch between said speed changing mechanism and said engine shaft, a reversing gear independent of the speed changing mechanism for connecting the transmission shaft to the axle, a lever, connections between the lever and the friction clutch and connections between the lever and the reversing gear whereby the reversing gear and clutch may be-coordinately operated without varying the speed transmittingmechanism- In a power-propelled road-roller, the combination with a frame, a steering-wheel swiyeled in the forward end, a pair of traction wheelssupporting the rear end thereof ofa gas engine and engine-shaft mounted on said frame, a clutch mounted on a hollow shaft which is free to turn on said engineshaft, a speed ed on said frame and connecting said clutch gto a bevel pinion, an operating lever for changing mechanism mountsaid speed-changing mechanism, two bevel gears loose on a counter-shaft on opposite sides of the bevel pinion, a balanced clutchsleeve splined on said counter-shaft between the two bevel gears, a lever, connections betweent he lever and clutch and between the lever and sleeve, said connection being so disposed that the clutch is closed subsequent to the movement of the sleeve for engagement with the beveled gears, substantially as described. l

4:. In a power-propelled road-roller, the combination with a frame, a steering wheel swiveled in the forward end, a pair of traction wheels supporting the rear end thereof, of a gas engine and engine shaft mounted on said frame, and engine clutch mounted on a hollow shaft which is free to turn on said engine-shaft, a speed-changing mechanism mounted on said frame and connecting said clutch to a bevel pinion, an operating lever for said speed-changing mechanism, two bevel gears mounted loosely on .a counter-shaft on opposite sides of the bevel pinion, a sliding clutch sleeve splined on said counter-shaft between the two bevel gears, a main operating lever, and connections from the latter to the engine-clutch and to the sliding clutch on the countershaft, whereby the engine clutch will be- .come engaged when the sliding clutch on swiveled in the forward end, an axle and pair of traction wheels supporting the rear end thereof, of a motor and motor-shaft mounted on said frame, a clutch and hollow shaft mounted forward of said motor, a speed-changing mechanism mounted forward of said motor and connecting said clutch and hollow shaft with a bevel pinion, an operating lever for said speed-changing mechanism, two bevel gears mounted loosely on a counter-shaft on opposite sides of the bevel pinion, a sliding clutch splined on said counter shaft, a spring-balanced lever s for said last clutch, a hand-lever, and connections between said hand-lever ter, said connections being so constructed that the clutch adjacent the motor'is closed subsequent to the engagement of the clutch on the counter-shaft with the beveled gears, substantially'as described.

6. Ina power propelled road roller, the combination with a frame, a steering wheel in the forward end thereof, an axle-and pair of traction wheels mounted thereon supporting the rear end of the'frame, of a motor and motor shaft mounted on said frame, a transmission shaft, a friction clutch between the motor shaft and the transmission shaft, a. reversing gear between the transmision shaft and the axle, a lever, connections between said lever and said reversing gear and connections between said lever and said, friction clutch,-said last named connections-including-a link disposed and clutches to simultaneously operate the lat-4 motor shaft, a friction clutch between the speed changing. mechanism and the engine shaft, a reversing gear between the transmission shaft and the axle, a lever, connections between the lever and the reversing gear whereby said gear may beshifted for a forward or rearward drive, connections between said lever and said friction clutch including a longitudinal reciprocating rod,

' a link pivotally connecting said rod to said lever, said link being so disposed as to move to the opposite sides of the. longitudlnal axis of the rod upon the shifting of the lever to throw the reversing gear whereby said friction clutch may be closed upon the movement of the reversing gear-in either direction and subsequently to the'engagement of the reversing gear with its oo-acting gear.

In testimony whereof I aflix my signature inpresence of two witnesses.

LAWRENCE B. WEBSTER. Witnesses:

GEORGE ,R. HARBAUGH, J. MoRoBERTs. 

